2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 237Get this manual
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MIDDLE GEAR
INSTALLING THE MIDDLE DRIVEN SHAFT 1.Install: Bearing retainer 1
80 Nm (8.0 kg, 58 ft lb)
NOTE: Attach the ring nut wrench 2 Ring nut wrench: PNYM-38404, 90